* @since 1.21
*/
class ScopedCallback {
- /** @var Closure */
+ /** @var callable */
protected $callback;
/**
- * @param $callback Closure
+ * @param callable $callback
+ * @throws MWException
*/
- public function __construct( Closure $callback ) {
+ public function __construct( $callback ) {
+ if ( !is_callable( $callback ) ) {
+ throw new MWException( "Provided callback is not valid." );
+ }
$this->callback = $callback;
}